In order for you to play Serious Sam VR: The First Encounter on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 14.04
Processor (CPU):
Intel Core i5 - 4590 equivalent
Memory (RAM):
6 GB RAM
Graphics Card:
AMD R9 290 or NVIDIA GTX 970
Storage:
10 GB available space
In order to play Serious Sam VR: The First Encounter on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 14.04
Processor (CPU):
Intel Core i7-6800 equivalent
Memory (RAM):
6 GB RAM
Graphics Card:
AMD Fury or NVIDIA GTX 1070
Storage:
10 GB available space